US3778841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction imaging system
Assignee: Xerox Corp
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Filing: 1972-08-09
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Granted: 1973-12-11
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Expires: 1992-08-09
Abstract
Abstract The invention relates to an induction imaging system suitable to accomplish development of an electrostatic latent image at a point remote from the photosensitive surface on which the latent image is originally formed. In one embodiment, an image support member bearing an electrostatic latent image is presented to a self-supporting film in the form of a continuous induction web, an image being thereby induced in the web, developed thereon and subsequently transferred to a receiver material. The continuous induction web may be charged with a negative, positive, ground or alternating potential while in contact with the image support member depending on the polarity of the electrostatic latent image on the image support member; or the continuous web may not be externally charged where only line copy reproduction is desired. In another embodiment of the invention, an image support member carrying an electrostatic latent image is presented to a receiver material having a bulk resistivity in the range of from about 107 to 1014 ohm-cm. An electrostatic image is induced in the receiver material, developed thereon and fixed thereto or transferred to a secondary copy sheet material and fixed thereon.
Inventors
- 👤 R Gundlach
- 👤 R Vock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/18; G03G15/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
An induction imaging apparatus comprising in combination a continuous recirculating web, an image support member, means for forming an electrostatic pattern on said support member, means for presenting said image support member to the first surface of said continuous web so as to position the imaged surface of said image support member in virtual contact with said first surface of said continuous web, thereby inducing an electrostatic latent image in said first surface of said web, and means to develop said induced image on the second surface of said continuous web, said developing means being positioned immediately adjacent to said continuous web at a point where said web separates from said image support member.
Claim 2
Dependent Claim
114 words
An induction imaging apparatus comprising in combination a continuous recirculating web, an image support member, means for forming an electrostatic pattern on said support member, means for presenting said image support member to the first surface of said continuous web so as to position the imaged surface of said image support member in virtual contact with said first surface of said continuous web, thereby inducing an electrostatic latent image in said first surface of said web, and means to develop said induced image on the second surface of said continuous web, said developing means being positioned immediately adjacent to said continuous web at a point where said web separates from said image support member.
Claim 3
Dependent Claim
16 words
The apparatus as defined in claim 1 wherein said continuous recirculating web is an endless belt.
Claim 4
Dependent Claim
29 words
The apparatus as defined in claim 1 wherein said continuous web comprises a relatively humidity insensitive material having a bulk resistivity of from about 107 to about 1014 ohms-cm.
Claim 5
Dependent Claim
15 words
The apparatus as defined in claim 3 wherein said development means comprises a conductive developer.
Claim 6
Dependent Claim
32 words
The apparatus as defined in claim 1 further including a means to transfer said developed image to a copy sheet and a means to fix said transferred image to said copy sheet.
Claim 7
Dependent Claim
17 words
The apparatus as defined in claim 1 wherein said development means comprises a magnetic brush development system.
Claim 8
Dependent Claim
15 words
The apparatus as defined in claim 1 wherein said development means comprise a transfer-development system.
Claim 9
Dependent Claim
159 words
An induction imaging apparatus comprising in combination a contiNuous recirculating web, an image support member, means for forming an electrostatic latent image on the surface of said image support member, means for contacting said continuous web with the imaged surface of said image support member such that said image support member is positioned in virtual contact with the inner surface of said continuous web, means for applying an electrostatic potential to the outer surface of said continuous web and means adapted so as to apply an electric field between said web and said image support member while said web is positioned in contact with said image support member thereby inducing an image pattern in the inner surface of said web, and means to develop said induced image pattern, said development means positioned relative to the site of separation of said continuous web from said image support member so as to allow for the preservation of said electrostatic latent image.
Claim 10
Dependent Claim
159 words
An induction imaging apparatus comprising in combination a contiNuous recirculating web, an image support member, means for forming an electrostatic latent image on the surface of said image support member, means for contacting said continuous web with the imaged surface of said image support member such that said image support member is positioned in virtual contact with the inner surface of said continuous web, means for applying an electrostatic potential to the outer surface of said continuous web and means adapted so as to apply an electric field between said web and said image support member while said web is positioned in contact with said image support member thereby inducing an image pattern in the inner surface of said web, and means to develop said induced image pattern, said development means positioned relative to the site of separation of said continuous web from said image support member so as to allow for the preservation of said electrostatic latent image.
Claim 11
Dependent Claim
16 words
The apparatus as defined in claim 8 wherein said continuous recirculating web is an endless belt.
Claim 12
Dependent Claim
28 words
The apparatus as defined in claim 8 wherein said continuous web comprises a relatively humidity insensitive material having a bulk resistivity of from about 107 to 1014 ohm-cm.
Claim 13
Dependent Claim
15 words
The apparatus as defined in claim 8 wherein said development means comprises a conductive developer.
Claim 14
Dependent Claim
30 words
The apparatus as defined in claim 8 further including means to transfer said developed image to a copy sheet and means to fix said transferred image to said copy sheet.
Claim 15
Dependent Claim
17 words
The apparatus as defined in claim 8 wherein said development means comprises a magnetic brush development system.
Claim 16
Dependent Claim
15 words
The apparatus as defined in claim 8 wherein said development means comprises a transfer-development system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |